This is backward-compatible with what we had before. We're not changing
the SSL mode - just making it configurable.

Most components are defaulting to `sslmode=disable`, while some
(`matrix-bot-matrix-reminder-bot` and others) do not specify an `sslmode` at all.

We're making sslmode configurable, because certain external Postgres
servers may be configured to require SSL encryption.
In such cases `sslmode=disable` does not work and needs to be changed to
`sslmode=require` or something else (`verify-ca`, `verify-full`, etc).

Update borgmatic 1.7.15 -> 1.8.2

Update Draupnir from 1.83.0 to 1.84.0

Update redis 7.0.12 -> 7.2.0

update etherpad (1.9.0 -> 1.9.2); update ntfy (2.6.2 -> 2.7.0)

Related to https://github.com/mautrix/gmessages/releases/tag/v0.1.0

update docker role; update prometheus node exporter (1.6.0 -> 1.6.1)

update nginx 1.25.1 -> 1.25.2

Update redis 7.0.10 -> 7.0.12

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2806

Update Element 1.11.38 -> 1.11.39

Update synapse 1.89.0 -> 1.90.0

Advertise sliding-sync support when using conduit

Starting from version `0.6.0` conduit natively supports some sync v3 (sliding-sync) features.

https://gitlab.com/famedly/conduit/-/releases/v0.6.0
https://gitlab.com/famedly/conduit/-/merge_requests/501

Update conduit 0.5.0 -> 0.6.0

Upgrade sliding-sync (v0.99.4 -> v0.99.5)

Update borg role v1.2.4-1.7.15-1 -> v1.2.4-1.7.15-2